Cs(Pb,Mn)Br3 Quantum Dots Glasses with Superior Thermal Stability for Contactless Electroluminescence Green-Emitting LEDs

Aochen Du; Wenxiao Zhao; Yu Peng; Xinzhi Qin; Zexi Lin; Yun Ye; Enguo Chen; Sheng Xu; Tailiang Guo

doi:10.3390/nano13010017

Cs(Pb,Mn)Br₃ Quantum Dots Glasses with Superior Thermal Stability for Contactless Electroluminescence Green-Emitting LEDs

Nanomaterials (Basel). 2022 Dec 20;13(1):17. doi: 10.3390/nano13010017.

Authors

Aochen Du^{1

2}, Wenxiao Zhao^{1

2}, Yu Peng^{1

2}, Xinzhi Qin^{1

2}, Zexi Lin^{1

2}, Yun Ye^{1

2}, Enguo Chen^{1

2}, Sheng Xu^{1

2}, Tailiang Guo^{1

2}

Affiliations

¹ College of Physics and Information Engineering, Fuzhou University, Fuzhou 350100, China.
² Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350100, China.

Abstract

CsPbX₃ (X = Cl, Br or I) perovskite quantum dots (PQDs) have gained increasing interest due to their superior performance in photoelectric applications. In our work, a series of Mn²⁺ doped CsPbBr₃ PQDs were successfully prepared in glasses by melt quenching and in situ crystallization technique. Due to the ⁴T₁ (⁴G)→⁶A₁ (⁶S) transition of Mn²⁺, a slight red shift from 510 nm to 516 nm was found, with the FWHM expansion from 18 nm to 26 nm. The PQDs@glasses showed excellent thermal stability, and the exciton binding energy reached a high level of 412 meV. The changes of the electronic structure after Mn doping CsPbBr₃ can be demonstrated by first principles. Finally, a contactless electroluminescence device with the PQDs@glasses was designed based on the principle of electromagnetic induction, which is a potential application for detecting distance in sterile and dust-free environments.

Keywords: contactless electroluminescent devices; exciton binding energy; first principle; perovskite quantum dots glass; superior thermal stability.

Grants and funding

This work was financially supported by the National Key Research and Development Program of China (Grant No. 2021YFB3600404), the Major Special Projects of Department of Science and Technology of Fujian Province (Grant No. 2021HZ021001); the Natural Science Foundation of Fujian Province (Grant No. 2022J01130129); and the Science & Technology Innovation Laboratory for Optoelectronic Information of Fujian, China (Grant No. 2020ZZ112).